JPS566045A - Manufacture of cylinder head - Google Patents

Manufacture of cylinder head

Info

Publication number
JPS566045A
JPS566045A JP8193179A JP8193179A JPS566045A JP S566045 A JPS566045 A JP S566045A JP 8193179 A JP8193179 A JP 8193179A JP 8193179 A JP8193179 A JP 8193179A JP S566045 A JPS566045 A JP S566045A
Authority
JP
Japan
Prior art keywords
cylinder head
valves
graphitizing
molten metal
space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8193179A
Other languages
Japanese (ja)
Other versions
JPS598659B2 (en
Inventor
Kazuhito Uchida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yanmar Co Ltd
Original Assignee
Yanmar Diesel Engine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yanmar Diesel Engine Co Ltd filed Critical Yanmar Diesel Engine Co Ltd
Priority to JP8193179A priority Critical patent/JPS598659B2/en
Publication of JPS566045A publication Critical patent/JPS566045A/en
Publication of JPS598659B2 publication Critical patent/JPS598659B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

PURPOSE: To prevent occurrence of cracks at the portion of cylinder head located between valves, by graphitizing only said portion of cylinder head and the region near the portion, and thereby increasing the mechanical strength at the portion without affecting machinability and heat conductivity of the cylinder head.
CONSTITUTION: Mold 4 is composed of upper part 5, lower part 5' and core 6 and disposed such that land 3 to be formed at portion 2 of cylinder head 1 located between valves is directed upward. In space 2' defining the portion of cylinder head 1 located between valves or land defining space 3', a graphitizing agent 8 put in a metal container 7 that is fused by the heat of molten metal is fixed to core 6 by means of support 9, and molten metal of normal case iron is poured into sprue 11. The molten metal thus poured into sprue 11 is filled gradually upwards from space 1' and at last comes into contact with graphitizing agent 8, thereby promoting graphitization of the portion 2. Here, it is necessary that the amount of graphitizing agent is small so that graphitized cast iron is formed only at the region near portion 2. Expansion 3 is removed after it is used for collecting floating dross.
COPYRIGHT: (C)1981,JPO&Japio
JP8193179A 1979-06-28 1979-06-28 Manufacturing method of cylinder head Expired JPS598659B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8193179A JPS598659B2 (en) 1979-06-28 1979-06-28 Manufacturing method of cylinder head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8193179A JPS598659B2 (en) 1979-06-28 1979-06-28 Manufacturing method of cylinder head

Publications (2)

Publication Number Publication Date
JPS566045A true JPS566045A (en) 1981-01-22
JPS598659B2 JPS598659B2 (en) 1984-02-25

Family

ID=13760210

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8193179A Expired JPS598659B2 (en) 1979-06-28 1979-06-28 Manufacturing method of cylinder head

Country Status (1)

Country Link
JP (1) JPS598659B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132505A2 (en) * 1983-07-28 1985-02-13 Klöckner-Humboldt-Deutz Aktiengesellschaft Cylinder head made of a ferrous material
JPS6481517A (en) * 1987-08-19 1989-03-27 Samsung Electronics Co Ltd Elastic surface wave filter for eliminating ground to ground interference of sattelite communication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132505A2 (en) * 1983-07-28 1985-02-13 Klöckner-Humboldt-Deutz Aktiengesellschaft Cylinder head made of a ferrous material
JPS6481517A (en) * 1987-08-19 1989-03-27 Samsung Electronics Co Ltd Elastic surface wave filter for eliminating ground to ground interference of sattelite communication

Also Published As

Publication number Publication date
JPS598659B2 (en) 1984-02-25

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